Learn about this topic in these articles:

history of Ukraine

…1949; he was succeeded by Leonid Melnikov. Purges in party ranks were relatively mild. However, real and alleged Nazi collaborators, former German prisoners of war and repatriated slave workers, Ukrainian “bourgeois nationalists,” and others suspected of disloyalty—essentially hundreds of thousands of people—were sent to concentration camps in the far north…

…after the death of Stalin, Melnikov was removed as first secretary of the Communist Party of Ukraine, or CPU—as the CP(B)U was renamed in 1952—for “deviations in nationality policy,” specifically, promotion of nonnative cadres and Russification of higher education in western Ukraine. His replacement was Oleksy Kyrychenko, only the second…